Saw filing and setting device.



No. 7||,o78. 'Patented oct. I4, |902.

H. D. SHARP.

SAW FILING AND SETTING DEVICEl` (Application filed Apr. 21, 1902.)

(No Model.)

THE wams PETERS cu. PuorrxumoA, wAsmNsTou, nfc.

UNITED STATES PATENT OFFICE.

HERBERT D. SHARP, OF BERLIN HEIGHTS, OHIO.

SAW FILING AND SETTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 711,078, dated October14, '1902.

Application filed April Z1, 1902. Serial No. 104,012. (No model.)

.To al?, whom zit may concern:

Be it known that I, HERBERT D. SHARP, a citizen of the United States,residing at Berlin Heights, in the county of Erie and State of Ohio,have invented a new and useful Saw Filing and Setting Device, of whichthe following is a specification.

My invention relates to certain improvements in devices employed forsharpening and setting the teeth of saws of that class in which drag orclearing teeth are arranged in alternation with .single or with a seriesof cutting-teeth, and has for its principal object to construct a simpleform of tool by which the points of the teeth may be arranged in properalinement, the drag or clearing teeth arranged at proper distance fromthe line of cutting-teeth in accordance with the charac-A ter of thework, and the cutting-teeth uniformly and evenly set throughout thelength of the saw-blade.

Vith these and other objects in view the invention consists in the novelconstruction and arrangement of parts hereinafter described, illustratedin the accompanying drawings, and particularly pointed out in theappended claims.

In the drawings, Figure l is a perspective view of a combination-toolconstructed in accordance with my invention and illustrating the same infile-holding position while the tool is being employed to place thecuttingteeth in proper aliuement. Fig. 2 is a face view of the tool,illustratingits use in gaging the projection of the drag or clearingteeth. Fig. 3 is a sectional elevation of the same on the line 3 3 ofFig. 2. Fig. 4 is a view similar to Fig. 2, illustrating the tool asemployed during the set-ting of the cutting-teeth. Fig. 5 is a sectionalelevation of the same on the line 5 5 of Fig. 4. Fig. 6 is Van elevationof the rear face of the tool.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawings.

The device is principally intended for use in connection with cross-cutand similar saws where clearing or drag teeth are placed at intervalsthroughout the length of the blade for the purposeV of removing theaccumulated sawdust from the kerf, and consists of a simple form ofcombination-tool by means of which the saw may be readily put into goodcondition Without the employment of highlyskilled labor.

Referring to the drawings, l0 indicates a base-plate of any suitabledimensions, which may be provided with a pair of openings 1l for thepurpose of decreasing the Weight of the tool, as well as to form aconvenient handle for manipulating the tool when the teeth are beingdressed preliminary to the sharpening operation. On the inner or lowerface of the plate are apair of parallel ribs l2, adapted for contactwith the saw-blade, although these may he dispensed with and the plate10 placed closely against the side of the saw. At the top of the plate10 are arranged a pair of recessed shoulders 13, said shoulders beingdisposed at points at or near the opposite ends ofthe plate and beingadapted to receive and hold a file or similar dressing-tool It is awell-known fact that after saws have been sharpened a number of timesthe teeth are uneven and as some project to a greater distance thanothers the cutting operation is rendered extremely difficult andirregular. To overcome. this difficulty and bring all of the pointsofthe cutting-teeth into the same line,l place the file in the recessesof theshoulders 13 and then move the tool to and fro along thesaw-blade, with the file in contact with the points of the teeth, untilal1 of the points are in the same plane. The teeth are then sharpened inthe usual manner, the blunt end formed by the ille on anabnormally-projecting tooth serving as a guide to the workman andinsuring the proper sharpening of all of the teeth if any ordinarydegree of care be exercised.

As is well known, the points of the dragteeth do not project the samedistance from the saw-blade as do the cutting-teeth, and the projectionofsuch drag-teeth is generally governed by the character of the wood onwhich the saw is to be used-the harder the wood the greater theprojection of the drag-teeth,and vice versa. To accurately gage theextent of projection of each of the 'drag-teeth, and thus secureuniformityof the teeth-throughout the length of the blade,I employ anadjustable gage-plate 15, mounted on a pin 16, carried by the plate 11at a point inwardly from the lower walls of a recess 17, formed in theupper edge of the plate 10. The gage-plate 15 is polygonal in form andis mounted eccentrically on the pin 16, its four or more gagefaces beingeach arranged at a different distance from the cent-er of the pin andeach representing a variation in the distance to which a drag-tooth mayproject.

To properly gage the extent of projection of the drag-teeth, thegage-plate 15 is turned until its then upper edge is at the requireddistance below the plane in which the lower faces of the shoulders 13are situated, and the cutting-teeth of the saw are placed in contactwith the faces 14 of said shoulders, the intermediate drag-teeth beingpositioned, as illustrated in Figs. 2 and 3, immediately in alinementwith the gage-plate 15. The outer end of the drag-tooth may then bedressed down by a file until its projecting end is in the same planewith the gaging edge of the plate 15, and in similar manner all of thedrag-teeth are correspondingly treated to insure uniformity ofprojection. If the points of the drag-teeth are to be located at agreater or less distance from the plane of the points of thecutting-teeth, the gage-plate is turned to the proper position and theoperation carried on as before.

On each side of the slot or recess 17 and between the vertical walls ofthe slot and the inner ends of the shoulders 13 are a pair of anvils 19,the surfaces of which are disposed at a suitable angle to the plane ofthe plate 10, the angles of the two anvils being different in order toaccommodate dierent kinds of saws or where the angle of set of the teethvaries. During the setting operation the tool may be secured to asuitable standard of any character by clamping it in position, and anopening 20 is formed in the plate 10 for the entrance of a pin, screw,or other fastening device.

During the setting of the saw the latter is placed in the positionillustrated in Figs. 4. and 5, the dragteeth being placed against thefaces 14 of shoulders 13 and forming the gagingdevicesfordeterminingthedistance which with saws of different type, the sawillustrated in the drawings being merely used as an eX- ample of oneform of saw on which the tool may be employed.

While the construction herein described, and illustrated in theaccompanying drawings,is the preferred form of the device, it is obviousthat various changes in the form, proportions, size, and minor detailsof the structure may be made without departing from the spirit orsacricing any of the advantages of the invention.

Having thus described my invention, what I claim as new is- 1. Acombination-tool for the purpose described, comprising a plate havingspaced shoulders forming teeth-engaging stops, said shoulders beingrecessed for the reception of a dressing-tile, and inclinedsetting-anvils forming a part of the plate and disposed at pointsbetween said shoulders.

2. A combination-tool for the purpose described, comprising a platehaving at its upper edge a pair of spaced shoulders adapted to engagewith the points of the teeth of a saw, said shoulders being providedwith recesses for the reception and support of a file, there being arecess formed in the edge of the plate at a point midway between the twoshoulders, setting-anvils forming a part of the plate and disposedbetween said recess and shoulders, and a revolubly-mounted gage 15carried by the plate adjacent to the recess and adjustable to presentany one of its edges to a position above the lower wall of said recess.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in the presence of two witnesses.

HERBERT D. SHARP.

Witnesses:

HENRY HART, WM. H. BUDERUS.

